[gdal-dev] OGR 1.9.0 won't open DGN file

[Zoltan Szecsei]

On 2012/06/20 12:56, Even Rouault wrote:
> Selon Zoltan Szecsei<zoltans at geograph.co.za>:
>
>> Hi,
>> I have some DGN v7 files with contours, and I wish to add up the total
>> length of all the contours in the file.
>>
>> Using:
>> zls at gs0:~/ngi10k/ngi10k_geo$ ogrinfo --version
>> GDAL 1.9.0, released 2011/12/29
>>
>> I get:
>> zls at gs0:~/ngi10k/ngi10k_geo$ ogrinfo 3117bb_lin_v7.dgn
>> INFO: Open of `3117bb_lin_v7.dgn'
>>         using driver `DGN' successful.
>> 1: elements
>> zls at gs0:~/ngi10k/ngi10k_geo$
>>
>> If I use parameters -so or -q or -geom=SUMMARY then I get the same
>> error,
> Which error ? The output of the above commands looks right. There is no error as
> far as I can see...
Ah! Sorry. That's my sloppy use of the word "error".
I was expecting to see some summary of my dgn file. eg: number of 
elements, layers occupied, who know's what else.
This expectation came from reading the ogrinfo description webpage.
I expected to see something different when I used different parameters 
-so, -q and -geom=SUMMARY, but got all the same "nothing".
There are just over 24000 contour lines, as either LINESTRING or 
MULTILINESTRING in this DGN file.
>
>> but if I use parameter -al, then the DGN file is opened and all
>> 24000 contours are dumped to stdout.
> Yes, that's expected.
Yes, so did I expect this. I was providing it to show that my DGN file 
was in fact 'dumped' , and hence usable/readable by ogrinfo.
>
>> QGIS 1.7.3 on Windows does open the same DGN file.
> Cool
>
>> How can I investigate further as to why Linux ogr won't open the file
>> using ?
> AFAICS, OGR did open the file. It is just that without the -al option, or
> specifying the layer name (elements), the features won't be listed in the
> console. I don't see any issue in the above, but I've perhaps not understood
> what you mean.
I did not want to dump the features. I was hoping that "SUMMARY" would 
give some useful info like layers occupied, element type/count and sum 
of line-lengths, poly perimeters/area etc etc (the sum of line lengths 
were what I was praying for).

Thanks for your response, and apologies for the misuse of the word "error".
Regards,
Zoltan
>
>> TIA,
>> Zoltan
>>
>> --
>>
>> ===========================================
>> Zoltan Szecsei PrGISc [PGP0031]
>> Geograph (Pty) Ltd.
>> P.O. Box 7, Muizenberg 7950, South Africa.
>>
>> 65 Main Road, Muizenberg 7945
>> Western Cape, South Africa.
>>
>> 34° 6'16.35"S 18°28'5.62"E
>>
>> Tel: +27-21-7884897  Mobile: +27-83-6004028
>> Fax: +27-86-6115323     www.geograph.co.za
>> ===========================================
>>
>> _______________________________________________
>> gdal-dev mailing list
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>>
>


-- 

===========================================
Zoltan Szecsei PrGISc [PGP0031]
Geograph (Pty) Ltd.
P.O. Box 7, Muizenberg 7950, South Africa.

65 Main Road, Muizenberg 7945
Western Cape, South Africa.

34° 6'16.35"S 18°28'5.62"E

Tel: +27-21-7884897  Mobile: +27-83-6004028
Fax: +27-86-6115323     www.geograph.co.za
===========================================